5. "I Don't Want to Waste Money on a Bike I'll Only Have for a Short Period of Time" (i.e. cost)
Smaller, used bikes have and retain good resale value. This is because other sane people will want them as learner bikes. You'll prolly be able to sell a used learner bike for as much as you paid for it. If you can't afford to upgrade in a year or two, then you definitely can't afford to wreck the bike your dreaming about. At the very least, most new riders drop bikes going under 20MPH, when the bike is at its most unstable periods. If you drop your brand new bike, fresh off the showroom floor, while your learning (and you will), you've just broken a directional, perhaps a brake or clutch lever, cracked / scrapped the fairings ($300.00 each to replace), messed-up the engine casing, messed-up the bar ends, etc. It's better and cheaper to drop a used bike that you don't care about than one you just spent $8,500 on. Fortunately, most of these types of accidents do not result in serious physical injury. It's usually just a big dent in your pride and...
6. EGO.
Worried about looking like chump on a smaller bike? Well, your gonna look like the biggest idiot ever on your brand new, but messed-up bike after you've dropped it a few times. You'll also look really dumb with a badass race bike that you stall 15 times at a red light before you can get into gear. Or even better, how about a nice R6 that you can't ride more than 15mph around a turn because you don't know how to counter-steer correctly? Yeah, your gonna be really cool with that bike, huh? Any real rider would give you props for going about learning to ride the *correct* way (i.e. on a learner bike). If you're stressed about impressing someone with a "cool" bike, or embarrassed about being on smaller bike, then your not "mature enough" to handle the responsibility of ANY motorcycle. Try a bicycle. After you've grow-up ("matured"), revisit the idea of something with an engine.
7. "Don't Ask for Advice if You Don't Want to Hear a Real Answer".
A common pattern:
1. Newbie asks for advice on a 1st bike (Newbie wants to hear certain answers)
2. Experienced riders advise Newbie against a 600cc bike for a first ride (this is not what Newbie wanted to hear).
3. Newbie says and thinks, "Others mess up while learning, but that wont happen to me" (as if Newbie is invincible, holds superpowers, never makes mistakes, has a "level head", or has a skill set that exceeds the majority of the world, etc).
4. Experienced riders explain why a "level head" isn't enough. You also need SKILL, which can ONLY be gained via experience. (Newbie thinks he has innate motorcycle skills.)
5. Newbie makes up excuses as to why he is "mature" enough to handle a 600cc bike". (skill drives motorcycles, not maturity)
6. Newbie, with no knowledge about motorcycles, totally disregards all the advice he asked for in the first place. (which brings us right back to the VERY FIRST point I made about "knowledge of subject matter").
7. Newbie goes out and buys a R6, CBR, GSX, 6R, etc. Newbie is scared of the power. Being scared of your bike is the LAST thing you want. Newbie gets turned-off to motorcycles, because of fear, and never gets to really experience all the fun that they can really be. Or worse, Newbie gets in a serious accident.
8. The truth of the matter is that Newbie was actually never really looking for serious advice. What he really wanted was validation and / or approval of a choice he was about to make or already had made. When he received real advice instead of validation he became defensive about his ability to handle a modern sport bike as first ride (thus defending the choice he had made). Validation of a poor decision isn't going to replace scratched bodywork on your bike. It isn't going put broken bones back together. It isn't going graft shredded skin back onto your body. It isn't going to teach you to ride a motorcycle the correct way. However, solid advice from experienced riders, when heeded, can help to avoid some of these issues.
I'm not trying to be harsh. I'm being real. Look all over the net. You'll see veteran after veteran telling new riders NOT to get a 600cc bike for a first ride. You'll even see pros saying to start small. Why? Because we hate new riders? Because we don't want others to have cool bikes? Because we want to smash your dreams? Nothing could be further from the truth. The more riders the better (assuming there not squids)! The reason people like me and countless others spend so much time trying to dissuade new riders from 600cc bikes is because we actually care about you. We don't want to see people get hurt. We don't want to see more people die in senseless accidents that could have been totally avoided with a little logic and patients. We want the "sport" to grow in a safe, healthy, and sane way. We want you to be around to ride that R6, CBR600RR, GSX-1000, Habayasu, etc that you desire so badly. However, we just want you to be able to ride it in a safe manner that isn't going to be a threat to yourself or others. A side note, you may see people on the net and elsewhere saying "600cc bike are OK to start with". Look a bit deeper when you see this. The vast majority of people making these statements are new riders* themselves. If you follow their advice you've entered into a situation of the blind leading the blind. This is not something you want to do with motorcycles. You may also hear bike dealers saying that a 600cc is a good starter bike. They are trying to make money off you. Don't listen. *(I consider anyone with under 30,000 miles a noobie)